Wednesday 29 August 2018

Spring ResourceLoaderAware example | Spring Tutorial | Spring Framework | Spring basics


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Spring ResourceLoaderAware example | Spring Tutorial | Spring Framework | Spring basics


Spring ResourceLoaderAware example | Spring Tutorial | Spring Framework | Spring basics

Spring ResourceLoaderAware example | Spring Tutorial | Spring Framework | Spring basics



pom.xml

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0%20http://maven.apache.org/maven-v4_0_0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>com.ram.core</groupId>
    <artifactId>SpringDemo</artifactId>
    <packaging>jar</packaging>
    <version>1.0-SNAPSHOT</version>
    <name>SpringDemo</name>
    <url>http://maven.apache.org</url>

    <properties>
        <spring.version>5.0.2.RELEASE</spring.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>3.8.1</version>
            <scope>test</scope>
        </dependency>

        <!-- Spring 5 dependencies -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-core</artifactId>
            <version>${spring.version}</version>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>${spring.version}</version>
        </dependency>
    </dependencies>
 
     <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.7.0</version>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                </configuration>
            </plugin>
        </plugins>
    </build>
 
</project>

names.txt

Peter
Ram
Juli

ResourceLoaderAwareImpl.java

package com.ram.aware;

import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;

import org.springframework.context.ResourceLoaderAware;
import org.springframework.core.io.Resource;
import org.springframework.core.io.ResourceLoader;

public class ResourceLoaderAwareImpl implements ResourceLoaderAware
{

    private ResourceLoader resourceLoader;

    public void setResourceLoader(ResourceLoader resourceLoader)
    {

        System.out.println(
                "setResourceLoader(ResourceLoader resourceLoader) is called "
                        + "by the Spring Container");
        this.resourceLoader = resourceLoader;

    }

    public void displayFileInfo()
    {
        Resource resource = resourceLoader.getResource("classpath:names.txt");

        try (
                BufferedReader br = new BufferedReader(
                        new FileReader(resource.getFile().getPath())))
        {

            String thisLine = null;

            System.out.println("Names from the files are..");
            while ((thisLine = br.readLine()) != null)
            {
                System.out.println(thisLine);
            }

        }
        catch (FileNotFoundException e)
        {
            e.printStackTrace();
        }
        catch (IOException e)
        {
            e.printStackTrace();
        }

    }
}

applicationContext.xml

<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-4.3.xsd">


    <bean id="resourceLoaderAware" class="com.ram.aware.ResourceLoaderAwareImpl" />

</beans>

App.java

package com.ram.core;

import org.springframework.context.support.ClassPathXmlApplicationContext;

import com.ram.aware.ResourceLoaderAwareImpl;

public class App
{
    public static void main(String[] args)
    {
        ClassPathXmlApplicationContext applicationContext = new ClassPathXmlApplicationContext(
                "applicationContext.xml");

        ResourceLoaderAwareImpl resourceLoaderAwareImpl = applicationContext
                .getBean("resourceLoaderAware", ResourceLoaderAwareImpl.class);

        System.out.println("resourceLoaderAwareImpl = "+resourceLoaderAwareImpl);
     
        resourceLoaderAwareImpl.displayFileInfo();
     
        applicationContext.close();
    }
}

Output

Aug 13, 2018 9:46:49 AM org.springframework.context.support.AbstractApplicationContext prepareRefresh
INFO: Refreshing org.springframework.context.support.ClassPathXmlApplicationContext@5b37e0d2: startup date [Mon Aug 13 09:46:49 IST 2018]; root of context hierarchy
Aug 13, 2018 9:46:49 AM org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions
INFO: Loading XML bean definitions from class path resource [applicationContext.xml]
setResourceLoader(ResourceLoader resourceLoader) is called by the Spring Container
resourceLoaderAwareImpl = com.ram.aware.ResourceLoaderAwareImpl@5c7fa833
Names from the files are..
Peter
Ram
Juli
Aug 13, 2018 9:46:50 AM org.springframework.context.support.AbstractApplicationContext doClose
INFO: Closing org.springframework.context.support.ClassPathXmlApplicationContext@5b37e0d2: startup date [Mon Aug 13 09:46:49 IST 2018]; root of context hierarchy

Click the below link to download the code:
https://sites.google.com/site/ramj2eev2/java_basics/SpringDemo_ResourceLoaderAware.zip?attredirects=0&d=1

Github Link:
https://github.com/ramram43210/javaee/tree/master/Spring_2018/SpringDemo_ResourceLoaderAware

Bitbucket Link:
https://bitbucket.org/ramram43210/spring/src/d89cccdb22c06b2e0a9adbdbd2c6a120a0f41423/Spring_2018/SpringDemo_ResourceLoaderAware/?at=master

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